money pit
US /ˈmʌn.i pɪt/
UK /ˈmʌn.i pɪt/
1.
something that costs a lot of money to operate or maintain
:
•
That old car has become a real money pit.
•
Buying that huge house was a mistake; it's been a money pit ever since.
something that costs a lot of money to operate or maintain